Trimming apparatus



Feb, 25, @3%

J. Q. HOLMES TRIMMING APFARATUS man? Filed Deo. 2, 1932 lO Sheets-Sheet 1 pdb., 25, 31936. L Q. HQLMES 250132,12?

TRIMMING APPARATUS Filed Dec. 2, 1932 lO Sheets-Sheet 2 ZOBZZW lO Sheets-Sheet 3 Syvum/Worf J. Q. HOLMES TRIMMING APPARATUS Filed Dec. 2, 1932 Mb.. 25, w36.

F65.. 259 Egg@ Q v HOLMES 2,03227 TRIMMING APPARATUS Filed Deo. 2, 1932 lO Sheets-Sheet 4 P ff Fm., 25? E93 J. Q. HCLMES TRIMMING APPARATUS Filed Dec. 2, 1932 l0 Sheets-Sheet 5 F., 25, H936.. J, Q. HOLMES TRIMMING APPARATUS Filed Dec. 2, 1932 l0 Sheets-Sheet 6 J'. Q. HOLMES TRIMMING APPARATUS Filed Deo.

2, 1932 lO Sheets-Sheet 7 wwww www w QN )NNN F65., 25, 3936. J Q HQLMES TRIMMING APPARATUS lO Sheets-Sheet 8 wenn M M W.,

Filed Deo. 2, 193g fm if 6%) Fd. 259 E936. 1. Q, HOLMES ZZ' TRIMMING APPARATUS Filed Deo. 2, 1932 lO Sheets-Sheet 9 ATTORNEY# 25, i193@ l Q HOLMES mm2? TRIMMING APPARATUS Filed Deo. 2, 1952 lO Sheets-Sheet l0 Patented Feb. 25, 1936 UNITED STATES PATENT OFFICE TRIMMING APPARATUS Ware Application December 2, 1932, Serial No. 645,362

17 Claims.

This invention relates to trimming apparatus and more particularly to apparatus for trimming ash from molded articles such as caps for automotive transformers.

It is among the objects of the present invention to provide simultaneously and automatically operating tools for trimming flash from transformer caps.

Another object of the present invention is autom 4matically to index a conveyor carrying transformer caps into operative alignment with the trimming tools.

Another object of the present invention is automatically to eject finished transformer caps from the conveyor so that the services of an operator are required for depositing transformer caps on the conveyor only.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein a preferred embodiment of one form of the present invention is clearly shown.

In the drawings:

Fig. l is a perspective view of an apparatus embodying the present invention.

Fig. 2 is a sectional View through a transformer cap before removal of the ash.

Fig. 3 is a fragmentary sectional View through 3o the transformer cap and the ash removing tools in operative engagement therewith.

Fig. 4 is a reduced detail View partly in section of the fiash removing tools in operative engagement with a properly supported transformer cap.

Fig. 5 is a sectional view taken on the line 5--5 of Fig. 4, and showing the arrangement of the ash removing or trimming bits of the upper tool.

l0 Fig. 6 is a top view of the lower flash removing and shaping tool.

Fig. '7 is a plan view of part of the apparatus with certain parts being shown in section, such section being taken along the line 'l-'l of Fig. 8.

45 Fig. 8 is a side elevation of the lower half of the apparatus as defined by and looking in the direction of arrows 3--8 in Fig, 1.

Fig. 9 is a fragmentary sectional View taken on the line 9-S of Fig. 7.

.'0 Fig. l0 is a front elevation of the lower half of the apparatus'looking in the direction of arrow lll in Fig. 9.

Fig. 11 is a sectional view taken on the line Il-l of Fig. 8.

Fig. 12 is an enlarged sectional view taken on the line |2-I2 of Fig. 8, showing the indexing clutch in driving engagement.

Fig. 13 is a View similar to Fig. 12 showing, however, the clutch disengaged.

Fig. 14 is a side elevation of the top part of the apparatus looking in the direction of arrow i4 in Fig. 1.

Fig. 15 is a fragmentary front elevational view of the apparatus part disclosed in Fig. 14.

Fig. 16 is a sectional View taken along the line IG-IB of Fig. 8.

Fig. 17 is an enlarged fragmentary sectional View taken on the line I'l-l'l of Fig. 7, disclosing the construction of the automatic ejector.

Fig. 18 is a View similar to Fig. 17 showing the ejector in action.

Fig. 19 is an enlarged longitudinal sectional view taken on the line I9-I 9 of Fig. 15 and showing details of construction of the mechanism for operating the upper tools.

Figs. 20 to 22 inclusive are reduced sectional views taken along the lines 2-2U, 2l-2I and 22-22 respectively, of Fig. 19.

Fig. 23 is a sectional view taken .on the line 23-23 of Fig. 22.

Fig. 24 is a fragmentary sectional View taken on the line 24-24 of Fig. 21.

Fig. 25 is a diagrammatic view illustrating the Ways and means employed in properly timing the operations of the various mechanisms of the apparatus.

Referring more particularly to Figs. 2 to 4 inclusive, the reference numeral designates a transformer cap which is being operated upon by the present apparatus. This apparatus is adapted to trim flash 3| and 32 and to shape a portion 33 of the transformer cap from the cross-sectional contour disclosed in Fig. 2 to that disclosed in Fig. 3. The apparatus provides a pair of upper trimming tools 34 and a pair of lower trimming tools 35 as can be seen in Fig. 1. Since both upper tools as well as both lower tools are identical in form and operation it is necessary specifically to describe only one set of cooperating tools 34, 35. As shown in Fig. 4 a transformer cap 30 is located in an annular recess 35 of a locating block 37 which itself is located in an annular recess 38 of a conveyor to be described later. The upper tool 34 consists of a tool holder 39 carrying a plurality of trimming bits 4D which as shown in Figs. 4 and 5 are received in concentrically arranged holes lll of tool holder 39 and longitudinally adjustable therein by means of set screws 42 and 43. These bits 4i), upon rotation about the common axis of the tool holder 39 and cap 30 are adapted to remove flash 3| which forms the bottom of an annular groove 44 whose side Walls are defined by the cylindrical periphery 45 of the Cap and by the cylindrical surface 45 of a metal rim 4l' molded into the cap. In order properly to align the bits V49 with the annular groove 44, a pilot 48 is adapted to enter and snugly fit into an aperture 49V of thecap. Pilot 48 is carried by a shell 58 which is longitudinally slidable within a recess of the tool holder and. normally urged in one direction by a spring 52, Interposed between shell 58 and pilot 48 is a ball bearing 53 which by means of the springrurged shell 59 is urged into engagement with the Vcap thereby maintaining the same within locai'lingyrecessY 36 prior to and during the trimming" operation. Rotative movement of shell 5l] relative'to tool holder 39 is prevented and longitudinal movement thereof relative to said tool holderis permitted 20 by means of'a Vset screw 54 in the toolV holder which projectsintoa longitudinal groove 55 of shell 59.' Therefore',l when tool holder 39'is lowered toward VVa properly-supported cap 30, pilot 48 will'rst align the annular groove 44' ofthe cap with trimming bits 48 beforethe latter enter said groove. Locating block 37 is furthermore Y provided with two recesses 56 Which are adapted to receive screws 57 molded into the cap, thereby preventing the latter from rotating Within recess 30 36. YThe lower tool 35 comprises a tool holder 150 having an annular recessV 6| in which is re' ceived a shaping tool 52 which is prevented from Y rotation relativeto tool holder 69 by means of.

a set screw ESthreaded into said tool holder and engaging a iiat'portion 64 of said shaping tool. Reference numeral 55 represents the cutting edge of the vshaping toolV as shownin Fig. 6.1 .In

Vorder properly to align the shaping tool with the capV portionr33 to besh'aped by saidtool, a pilot 65 longitudinally adjustably carried by the shaping tool is adapted to enter a recess 87 of the capVV v prior to the operative engagement of the shaping tool with said cap portionv33.

Referring particularly to Fig. lV several sup- 45 ports for various mechanism of the apparatus 'are shown` such as a large table or base 70, a

-frame 7| supported by said base and a smaller table 72. The various mechanisms carried by Y Vthe supports are a conveyor and indexing mech- '50 anism A, a mechanism 2BV for actuating trimming tools 34, a mechanism C for reciprocating tools 35, work ejecting means D,fand control ,of apparatus. A Y Y Conveyor and indexing? mechanism A With particular referenceto Figs. 1 and '7 to 11 inclusive, a frame 88 is shown mounted in any suitablevmannerupon-table 72. This frame is' provided with a boss 8| which serves as support 60 for a non-rotatable stub shaft 82 having an integral collar 83 resting on the :top of boss 8|.`

70 against collar 83' of shaft 82. A cover plate 9|)Y secured to bracket 88 by screws 9| prevents dust and othery undesirable foreign substance from reaching the ball bearings. Press fitted or otherwise securedto the Yperiphery of bracket 88 'is a Y 7'5conveyor 92 which as previously stated provides a plurality of annular recesses 38 in Whichwork locating blocks 37 are received. Conveyor 92y and bracket 88 which forms a hub for the conveyor are rotatable in unison about the axis ofV stub shaft 82, and the locating blocks 37 on the Y conveyor are located concentric Withrespect'to` the axis of said stub shaft. Also securedin any' suitable manner to a reduced'concentric;portion Y 93 of bracket 88 is a vGreneva gear 94 which is `Vin mesh with a Geneva driver 95 keyed at 96 to a stub shaft 97 which is'parallel to stub shaft 82 androtatably supported Vin bearings 98 and 99V VSplined to shaft 97 as atl 86 is a companion clutch member |87 which is longitudinally shiftable Y into Vor* out lof engagement with clutch member |93Y by means to be describedY later. Worm gear isV ||Y is in meshvwith a'worm |88, keyed .at |99 to a shaft H9 properly supported in bearings provided by auxiliary frameV |98 and carryingV at one end a pulley lli, which through a suitablebelt connection llais driven from an electric motor,

||l|a(seeFig.10). n i The indexing of conveyor 92 is determined by the engagement or disengagement between clutch members |83 and |97.A As best shown in Figs. 9,*

l2 and 13 a clutch shifter bar I2 is pivotallyV mounted at I3 tothe Wall I4 of auxiliary frame Vl ll. Secured in any suitable manner toV auxiliary frame |90 is a cylinder I5 containing a piston H9 which is normally urged in the direction of arrow ||7 (see Fig. 12) by a spring ||8 :bearing with one Yend. against said piston and with the Vother end against a cylinder cover |9. Threaded into piston I5 and locked in adjusted position by a nut |28 isa screw |2|Ywhose head |22 is Ain vertical alignment With clutch shifterbar ||2.`

A tube or hose connection |23 providesV communication at times, to be described, between a source of fluid pressure such as compressed air `and the cylinder chamber |24. When fluid pressure is admitted to saidY chamber |24, piston IE is moved against the tendency of the spring ||8 in the direction of arrow |25, whereupon the screw headl22 rocksclutch shifter bar 2 from the position shown in Fig. 13 to that shown in Fig. 12, whereby clutch member |07 is shifted into driving engagement with clutch member |03. The

disengaged from clutch member |93 at the proper timefY This is accomplished byrproviding a latch bar |26, pivotally mounted at |215 to auxiliary frame |80, which latchY bar hasV a shoul- Vder- |28' preventing clutch shifter bar 2 when in clutch engaging position fromV moving into clutch disengaging position. Latch bar |26 is Y urged in a clockwise direction as viewed in Fig. i8 byra compression spring |29 which is interposed between a bracket |39 securedltorframe 89 in any suitable mannen'and between a collar |3| of a clevis |32, p-ivotally mounted at |33-to said latch bar-and slidable substantially longiansatz? 3 usually through hasta un. best sinwn in Figs 7,19 amii, Gelieve driver 95, carries e projecting pin |34 which during one rotation of said Geneva driver in the direction of arrow |35, in Fig. 25, engages and rocks latch bar |26 against the tendency of spring urged clevis |32, whereby shoulder |29 of said latch bar clears clutch shifter bar 2, whereupon the same is rocked clockwise as viewed in Fig.` 10 by a compression spring |36 which is located in a recess |31 of auxiliary frame |00. Such movement of clutch shifter rod ||2 results in disengagement between clutch members |01 and |03 as can be readily understood from Figs. 12 and 13. It may be stated in advance that at the release of clutch shifter bar H2 from latch bar |26, cylinder chamber |24 does not contain uid under sufficient pressure to prevent movement of clutch shifter bar ||2 into disengaging position by means of compression spring |36. Upon disengagement of clutch member |01 from com-f panion member |03 conveyor 92 comes to rest.

Mechanism B ,for actuating trimming tools 34 Referring more particularly to Figs. 1 and 19 to 24 inclusive, an electric motor |40 is shown mounted in any suitable manner on a casing |4| which houses the mechanism to be described and is vertically adjustably carried by frame 1|. A gear |42 mounted on the armature shaft |43 meshes with a gear |44, keyed to a tubular sleeve |45 and held in position by a collar |46 threadedly engaging the end of the tubular sleeve |45 which is journaled in. end thrust bearings |41 and |48. A spindle |49 is splined to the tubular sleeve |45, journaled with its lower end in a ball bearing |50 and carries beyond said ball bearing a gear (not shown) which is enclosed in a housing |5 consisting of two halves |52 and |53. flousing |5| is nonfrotatably supported in any suit-r able manner by a quill |54, through, which sii-iri-v dle |49 extends. Endwise movement of spindle |49 relative to quill |54 which iS Sldable longitudinally in an annular recess 0f casing I4! is prevented by a shoulder |56 integral with spindle |49 and resting against the inner race 0f ball bearing |50, a nut |51 which is threadedly received by the quill 54 and retains the outer race of said ball bearing in engagement with a shoulder |50 provided by said quillZ and a nut |59 which is threaded over spindle |49 and retains shoulder |58 in rm engagement with the inner race of ball bearing |50. From this it may be seen that spindle |49 is rotatable whenever motor |49 is running, and it may also be understood that the spindle |49 continues to rotate even though it moves axially. Quill I 54 may move longitudinally relative to casing 4| but is held non-rotatable relative thereto by a key |60. located in the casing |4| and projecting into a longitudinal groove |6| provided by the quill.

The tubular sleeve |45 is provided with a worm |10 meshing with a worm gear |1| keyed to a shaft |12 (see also Fig. 20) which is journaled in bea/rings |13 and |14 supported by the casing |4.| and held in position by screws |15 and |16 respectively. Shaft |12 carries a spur gear |11 which meshes. with a gear |18 (see Fig. 21), keyed to a tubular member |19 rotatably mounted on a shaft which is journaled in bearings |8| and |82, provided by a gear retaining cap |83 and an end cover |84, respectively, each of which is attached to the casing |4| in any suitable manner. Intermediate the tubular member |19 and shaft |80 is mounted a bushing |85. As best seen in Fig. 2@ member |19 terminates in radial teeth |86 which cooperate with corresponding teeth |81 integral with a member |88 splined to shaft |80. Also splined to shaft |80 is a cam disc |89 which cooperates with a cam follower |90, mounted on a pin |9l, carried by a rack |92 and held in position by a set screw |9la. As the cam disc |89 rotates counterclockwise as viewed in Fig. 19, the rack |92 will be urged downwardly so as to feed spindle |49 toward the work through a driving connection consisting of a gear member |93 rotatably mounted upon a shaft |94 and meshing with gear teeth |95 of rack |92. Gear member |93 cooperates with a gear member |96 which meshes with rack teeth |91 provided therefor on the quill |54 in order to feed the spindle |49 downwardly as viewed in Fig. 19. Gear member |93 is provided with a frusto-conical external surface |98 which cooperates with a frusto-conical internal surface |99 o'f gear member |96 so as to permit longitudinal adjustment of quill |54 relative to casing I4 Gear members |93 and |96 are held in frictional engagement by a nut 200 threadedly engaging the end of shaft |94 and by a shoulder 20| provided by a collar 202 integral movement by the length of slot 205 within safe limits whereby it is impossible for gear member |96 to demesh from the quill rack |91 at any longitudinal adjustment of the quill. The end of shaft |94 terminates in a square portionl 206 which permits the operator to' adjust quill |54 without dismantling the machine.

The mechanism for retracting quill |54 from the work comprises, as best seen in Figs. 22 and 23, spiral spring 2| 0 which has a hooked end 2| engaging a recess provided therefor in a re` duced portion 2|2 of gear member 93, and a hooked end 2 3 engaging a recess in a cup-shaped member 2|4 which is rotatably mounted in end cover |84. In order to adjust the tension of the spring 2|0, member 2| 4 has been provided with ratchet teeth 2|5 which cooperate with a pawl 2 I6, mounted on a pin 2| 1 which is carried by end cover |84. The spring 2|0 which has been even more compressed during the downward movement of quill |54, urges the latter away from the work and the cam follower upwardly as viewed in Fig. 19 when the latter has passed the concentric portion 2| 8 of the cam |98 during its counterclockwise rotation and is free to move into the depression 2|9 of said cam.

A device has been provided to stop the mechanism from reciprocating quill |54 again after the latter has been retracted into the position shown in Fig. 19. This stopping device consists of a cam projection 220 integral with member |86, which engages a releasing lever 22| mounted on a pivot 22,2 carried by the casing 4| In Figs. 19, 21 and 24 it may be seen that as the cam projection 220 strikes the lever 22|, member |88 will be biased against the force of a helical spring 223 so as to disengage the radial teeth |08 and |81, whereby member |19 will rotate without driving member |88 and the parts driven thereby. In order to reciprocate quill |54 it is necessary to rock lever 22| counterclockwise as viewed in Fig.

i Ci

Y the tendency of spring 224.

V221 torock counterclockwise and release clutch member |38 whereupon the same engagesV com- 19 whereuponV member I 88-isfree to engage member |19. Normally lever. 22| is maintained in the position shown in Fig. 19 Vby a compression spring 224 located inra recess 225 of casing |41 and urging a rod 226 which is pivoted at 221 to lever 22| in the direction of arrow 228 Vin Fig; 19. As shownin Fig. 25 a stationary cylinder 229 is provided containing a piston 239 whose piston rod 23| mounted bell crank lever 232. Also floatingly pivoted to lever 232 is the rod'226. Upon ad'- missionV of iiuid pressure to cylinder 229, vpiston 236 is urged toward the right as viewed in Fig. 25 whereby leverV 232 is rocked counterclockwise as viewed Yin Fig. 25 and rod 226 is moved against This causes lever panion memberl19, and thus starts a reciprocation of quill |54. FluidV pressure is shut off from Y cylinder 229 beforethe clutch members |88 and |19 complete one revolution as will be more fully Y described later. Therefore, lever 22| isV returned Vinto the obstructing position shown in Fig. 19 by spring 224 before the cam lug 229 completes one revolution and upon engagement with said cam lug at the end of one revolution shifts member 88 out of driving engagementV with companion Y said shafts Y26|). 1

Mechanism C for reciprocating tools 35 Y y Referring moreparticularly to Figs. 1,Y to 10 inclusiveand 14 to 16 inclusive, base 19 provides guide ways 259 for guiding a support plate 25| fer vertical movement. Mounted in any suitable manner on said support plate is. a` casing Y252 which is'closed by a cover 253. Journaled in ball bearings 254 provided by casing 252 but axially immovable relative thereto are two par-V allel tool holders 99 which are in axial alignment with tools 34. The lower end of each tool holder 60 carries a gear 265 which is in'mesh with a gear 256 carried by. a vertical stub shaft-'251V rotatably-but axially Virnrnovably supported .by bearings 258 and 259 (see Fig.' 16) Vprovidedrby rcasing 252 and a bearing bracket 269 respective# ly, which is also mounted on supporting plate'25 l Intermediate its bearings, shaft 251 carries a pulley 26| which is continuously driven by a suitable beltrconnectionV 262 from a stationary electricY motor 263. En this manner'the tools ,62 are continuously rotated, and in order to reciprocateV the same toward and away from the work, plate 25| with all the structure supported Vthereon isV reciprocated in the guide ways 250 by Ymecha-V nismV to be describedY presently. As showngin Fig. 16 piate 25| is apertured at 264 and receives therein Vthe forkedend ofV a lever 265Y mounted on a shaft 266 which as clearly shown inFigs. l and 7 is rotatably supported in bearing bracket 261 suspended from base 13. Pivotally mounted on and locatedrin the fork of lever 265 is an antifriction roller 269V against which bears the head 269 of a screw 219, adjustably secured to supportoatingly pivoted to a rotatably ing plate 25|. The entire weightV of` the support- :ing plate 25| and the structure thereonris trans- Lmitted through the head of screw 210 to the roller 263 as'can be readily understood. Rocking of shaft 266 in counterclockwise direction as viewed in Fig. 1 causesmovement of supporting plate 25| 'in the direction of arrow 21| in Fig. 1 Vwhereby the tools 35 are moved toward the work.L

216 which is attached'in any suitable manner to frame 1|, disc cam 211 which, as best shown in Fig.v 21 is keyed to shaft |69.` so timed that simultaneously with the engagement of the tools 34 withV the work, the tools 35 engage the work also. The descent ofthe tools 62 is by gravity but isV controlled by. cam'r211 as can be well understood from the foregoing des-* scripton. VThe reciprocating movement of .thev

shaft 251 does4 not interrupt its continuous rotation because the belt connection 262 yieldssufciently without slipping.

In order properly to alignthe work with allk Vtools prior to its nal alignmentvby the pilots of the tools, casing |5| carries two pilot bars 280 whosevreduced' ends 28| are adapted to pro-ject into a pair of a plurality of suitable bushing 282 in a plate 283V concentrically mounted ion'con- Yveyor 92 as best disclosed in Figs. 1 and 9,

Plate 223 isso located on conveyor 92 that when 'the reduced ends of pilot bars 280 register with a pair of aligned bushingsV 292,Y allY tools ,are inV substantial alignment withthe work..

Work ejectzng mechanism D Cam follower 214 cooperates with al The action of cam 211 is A Referring more particularly to Figs. "l, 11, 1'1.Y Y

' and 18 a bracket 299 is mounted in any suitable manner on frame 89. Pivoted at 29| to bracket` 299 is a T-lever 292-whrich is constantlynrged.

toward conveyor92 by a compression spring 293 located in a boss 294 of bracket 290. '292 Vis provided with non-metallic pads 295 in order to prevent damage tothe work `when catapulted from the conveyor in a Vmanner to be described presently. Spring 293 is of such strength that the` weight .of T-lever' 292 compresses said Vspring -sufciently soY that the-pads 295 clear the conveyor. When T-lever'292 is, however, rocked clockwise'as viewed in Fig.' l1 by one of a plu- T-lever.

rality of cams 296 carried by the conveyor 92,'

spring 293 is appreciably compressed and upon sudden release of the lever 292 from said passing cam, the spring expands and Ythrows T-lever 292 in a counterclockwise direction as viewed in 1lV whereupon the work previously Vfinished catapulted Yfrom'the conveyor by the pads1295 in a Vnianner illustrated in Figs. 1'7 Vandrl8 which gures thel conveyor moves in the direction or arrow 291. The number of cams 296l is naturally'the same as the number o pairs of Y workpieces or Ytransformer caps that can be Y.deposited on the conveyor at-,one'time Y Referring to Fig. 9 an unloading means'is provided in the form of a ball bearing 396 ,engagingV thebottorn surface of conveyor 92 and supported Vby a bracket arm 39| mounted Vin any suitable catng blocks 31 of the conveyor.v i

C'ontrol of apparatus While describing the control of the apparatus it is deemed proper to describe in a logical connection therewith its-mode of operation. Relying during the following description Yprincipally on Fig. 25 but not exclusively, a main shut-off valve A3H] is shown which communicates through a pipe or hoseconnection 3| I with a source of any suitable fluid pressure (not shown). Valve 3H) is vcontrolled by a lever 3|2 which may be rocked by an operator from the full line position in Fig. 25 to Ythe dot-and-dash position thereof and vice versa. Fig. 25 discloses the relative positions be: tween various mechanisms of theapparatus while at rest, i. e. when main shut-olf valve 3H] is closed. In order to start the machine, the operator manipulates a handle 3|3, causing lever 3|2 to shift into the dot-and-dash position in which to open said valve 3 l0. Since the trimming tools are all in most retracted position in the assumed Vcondition of the apparatus, a bar 3| 4 carried ,by housing and guided for vertical movement, through bearings 3|5 on casing |4| is in an uppermost position, in which position of said bar anvadjustable screw 3|6 carried bya block .3|1, -in Vturn carried by bar 3|4, maintains a Powell blow-gun 3|8 open. Fluid pressure is .therefore admitted from the source through main 30 lshut-oir valveSIU, through a suitable connection 3|3, through Powell blow-gun 3|8, and through thepipe or hose connection |23 to the cylinder Vchamber |24 (see Fig. 12) whereupon vclutch member-|01 drivingly engages companion member |83 andthe conveyor starts to rotate. Upon the comlpleted shifting of clutch Jmember |01, clutch ,shifter bar |2 is arrested in clutch engaging posi- :tion by latch bar |28. In order to index the conf'veyor, Geneva driver 95 revolvesfonce and before gcompletingone revolution and shortly before the 40 conveyor completes the intermittent rotation,one of aplurality of cam lugs 320 on Atheperiphery of the conveyor opens another stationaryV Powell lblow-,gun 32| which then provides communica- `tionbetween cylinderl 229 and the source of Afluid 45 ,pressure through main shut-oli Valve 3 D, .a ,suit- -able ,connection .322 and another lsuitable connection 323. Admission of fluid pressure into cylinder;229 results in va tripping `of; barg226 against the tendency of springV 224 whereupon `all ,continyuously rotating tools commence to reciprocate .oncerin amanner previously described. Immedi- .ately after the cam lug 320 passes Powellblow- Lgun, 32|, the mentioned communication is interr.ceptedbythe .self-closing Powell blow ,gun 32| `55 land the bar1 22|5v is returned by spring 224 into the ,psitionkshown in Figs. 25 and 19, the remaining lfluidpressure in connection 323 and cylinder y229 ileaks .sumciently so that the rapidlydropping Apressure ofsaid` remaining fluid does4 notsuccess- '5 lfully counteract the tendency of the spring-224. :After the bar 226 has been tripped and before the ,.i pilot bars 280 register with the locating bushings 282onthe conveyor, the Geneva driver 55 com- Y v plctes one revolution, and shortly before com- @5 V.pletion of lone revolution, the pin |34 on said driver 95 rocks latch bar |26vagainst the tendency -ofspring |29 and unlatches clutch shifter bar ||2 which is urged into clutch disengaging position by springr |36. Upon return of the toolsintomost '7 Aretracted position, the adjustablescrew 3|6-again opens Rowellblow-gun 3 8 to start another index- Ying of the conveyor and subsequent reciprocation of the tools. v,If however,V the operator at any time before the return of the toolsvintolmostretracted *75 position closes the main shut-off valve, no new indexing of the conveyor and reciprocation of the tools takes place as can be easily understood from Fig. 25. As appears from Figs. 1, 17 and 18 the work ejection takes place at the moment the conveyor stops after an intermittent rotation, thereby giving the T-lever ample time to swing into balance after the catapulting of a pair of transformer caps from the conveyor.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to beunderstood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. Apparatus for trimming flash from articles having a recess concentrically of the ash comprising, in combination, a workholder for nonrotatably supporting an article; a rotating tool for trimming ilash from the article; spring urged means carried by said tool for retaining the article in the workholder and for properly aligning the article with the tool, said means including a member which is not rotated when engaging and retaining the article in the workholders and a pilot rotatable with said tool and registering with the recess of the article; and means for causing relative bodily movement between the tool and the article for the performance of a trimming operation.

2. Apparatus for trimming ash from articles comprising, in combination, a rotary conveyor for non-rotatably supporting articles; a, reciprocable tool for trimming ash from an aligned article at a certain station of the conveyor; means for indexing the conveyor so as to align successive articles with the tool; and a spring urged member located at another station of the conveyor for catapulting a finished article from the conveyor.

3. Apparatus for trimming flash fromarticles comprising, in combination, a rotary conveyor for non-rotatably supporting articles; a reciprocable tool for trimming flash from an aligned article at a certain station of the conveyor; means for indexing the conveyor so as to align successive articles with the tool; and a spring urged member actuated in response to an intermittent rotation of the conveyor for catapulting a nished article from the conveyor.

l4. Apparatus for trimming flash from articles comprising, in combination, a rotary conveyor for non-rotatably supporting articles; a reciprocable tool for trimming flash from an aligned article; means for indexing the conveyor so as to align successive articles with the tool; a pivotally mounted spring urged member for catapulting a finished article from the conveyor; and cams carried by the conveyor for actuating the member.

5. Apparatus for trimming flash from articles comprising, in combination, a rotary conveyor disc having a plurality of article receiving apertures for non-rotatably supporting articles; a reciprocable tool for trimming iiash from an aligned article; means for indexing the conveyor so as to align successive articles with the tool; a pivotally mounted member having a projecting portion for catapulting a nished article from the conveyor; a spring urging the member toward the conveyor but normally keeping said member out of the path of movement of the articles on the conveyor; and cams on the conveyor for depressing the member against the tendency of the spring and then for suddenly releasing the depressed member whereupon the same is catapulted by the compressed spring so that the projection of said member enters an aperture of the conveyor and y() "in response to operation of the indexing means.

VVGeneva gears for indexing the conveyor so as to and a piston therein for drivingly connecting the 'y strikes against a supported nished article theree by catapulting the lattervfrom the conveyor.

having a recess concentri'cally of the ash comprising, in combination, a workholder for nonrotatably supporting an article; a rotating tool fior trimming iiash from the article; a sleeve carried by said tool and rotatable therewith; a pilot carried by said sleeve andV having a head adapted to register with the recess of the article for properly aligning said article with the tool; an antifriction bearing interposed between the sleeve and the pilot head and adapted to engage and retain the article in the workholder; and means for causing relative bodily movement between the article and the tool for the performance of a trimming operation. Y

7. Apparatus for trimming flash from articles Ahaving a recess concentrically of the flash comprising, in combination, a workholder for nonrotatably supporting an article; a rotating tool for trimming flash from the article; a sleeve carried by said tool for rotation with the latter and Alongitudinal movement relative to the latter; a

stop carried by the tool; a spring urging the sleeve toward said stop; a pilot carried by said sleeve and having a head adapted to register with the Y recess of the article for properly aligning said "article with the tool; an anti-friction bearing interposed between the sleeve and the piloty head and adapted to engage and retain the article in Vthe workholder; and means for causing relative Vnon-rotatably supporting articles; a reciprocable tool for trimming flash from an aligned article;

Vmeans for indexing the conveyor so as to align successive articles with the tool; power means for operating the indexing means; a normally dis- Y lconnected clutch Vfor drivingly connecting the Ypower means with the indexing means; a cylinder and a piston therein for drivingly connecting the clutch; a normally closed valve for connecting the cylinder with a supply of l fluid pressure, said valve being opened by the tool during the latter part of its withdrawal from an article; and means latching the clutch in connected position, said means being actuated so as to release the clutch align successive articles with thetool powermeans for driving the Geneva driver; a normally disconnected clutchY for drivingly connecting the .power means with the Geneva driver; a cylinder and a piston therein for drivingly connecting the clutch; a normally closed valve for connecting the cylinder with a supply of uid pressure, said valve `*being opened by the tool during the latter part of its withdrawal from an article; and a springurged latch retaining the clutch Vin connected position. l0. Apparatus for trimming flash from articles comprising, in'combination, a rotary conveyor forA vnon-rotatably supporting articles; a reciprocable tool for trimming flash from an aligned article;

align successive articles with the tool; power means for` driving the Geneva driver; a normally disconnected clutch for drivingly connecting the power means with the Geneva driver; a cylinder clutch; a normally closed valve for connecting the cylinder with a supply of fluid pressure, said valve 'being opened byV the tool during the latterpart of its withdrawal from-an article; a spring urged latch retaining the clutch in connected position; and a pin carried by the Geneva driver and adapted to withdraw the latch from the'drivingly connected clutch when passing the former.

1,1. Apparatus for trimming flash from articles v ing the retaining means to release theV connected clutch. Y Y

12.l Apparatus for trimminglla'shy from articles comprising, in combination, a rotary conveyor for non-rotatably supporting articles; a reciprocable tool forV trimming flash from an aligned article; indexing means for intermittently rotating the conveyor so as to align successive the indexing means; a normally` disconnected clutch for drivingly connecting the power means with the indexing means; a cylinder-and a piston therein for drivingly connecting the clutch; a normally closed valve for connecting the cylinder with a supply of fluid pressure, said valve being opened by the tool during the latter part of its withdrawal from an article; means retaining the clutch in connected position, said means releasing Vthe clutch in response to operation of the indexing means; a mechanism for reciprocating the tool; means including a cylinder and a piston Ytherein for renderingY said mechanism eiective; a normally closed valve connecting the last mentioned cylinder with a supply of iluid pressure; and cam lugs on the conveyor for opening said Ylast mentioned valve when passing the same.

13. Apparatus for trimming flash from articles comprising, in combination, a rotaryk conveyor for non-rotatably supporting articles; al reciprocable tool for trimmingiiash from an aligned article; means for indexing the conveyor so as to align successive articles with the tool; power means for operating the indexing means; a nor- Y articles With the tool; power means for operating mally disconnected clutch for drivingly connectving the power means with the indexingmeans;

a cylinder and a piston-therein for drivingly connecting the clutch; a manually operable shut-oir valve communicating with a source of uid pressure and having two branch conduits; a normally s closed valve. for connecting the cylinder with one of the branch conduits, said valve being opened by the tool'during the latter part of its withdrawal from an article; means retaining the clutch in connected position, said means releasing the clutchY in response to operation ofthe indexing means; a mechanism for reciprocating the tool; means including a cylinder and a piston therein for rendering said mechanism effective; anda normally closed valve connecting the last mentioned cylinder with the other branchvcon- 1 duit, said valve being opened in response to interkcts 14. Apparatus for trimming ash from articles comprising, in combination, a rotary conveyor for non-rotatably supporting articles; a plurality of reciprocable tools for simultaneously trimming flash from a group of aligned articles at a certain station of the conveyor; means for indexing the conveyor so as to align successive groups of articles with the tools; and a single `spring urged member located at another station of the conveyor for simultaneously catapulting a group of finished articles from the conveyor.

15. Apparatus for trimming flash from articles comprising. in combination, a rotary conveyor for non-rotatably supporting articles; a plurality of reciprocable tools for simultaneously trimming ilash from a group of aligned articles at a certain station of the conveyor; means for indexing the conveyor so as to align successive groups of articles with the tools; and a single spring urged member actuated in response to an intermittent rotation of the conveyor for simultaneously catapulting a group of nished articles from the conveyor.

16. Apparatus for trimming ash from articles comprising, in combination, a rotary conveyor for non-rotatably supporting articles; a plurality of reciprocable tools for simultaneously trimming ash from a group of aligned arti-cles at a certain station of the conveyor; means for indexing the conveyor so as to align successive groups of articles with the tools; a single spring urged member for simultaneously catapulting a group of finished articles from the conveyor; and cams carried by the conveyor for actuating said member.

17. Apparatus for trimming flash from articles comprising, in combination, a rotary conveyor disc having a plurality of article receiving apertures for non-rotatably supporting articles; a plurality of reciprocable tools for simultaneously trimming flash from a group of aligned articles; means for indexing the conveyor so as to align successive groups of articles With the tools; a single pivotally mounted member having a plurality of projecting portions; a spring urging the member toward the conveyor but normally keeping said member out of the path of movement of the articles on the conveyor; and cams on the conveyor for depressing the member against the tendency of the spring and then for suddenly releasing the depressed member whereupon the same is catapulted by the compressed spring so that the projections of said member enter apertures of the conveyor and strike against a group of nished articles therein thereby catapulting the latter from the conveyor.

JOHN Q. HOLMES. 

